<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title></title>
		 <style type="text/css">
        #tagsList{
        	position: relative; 
        	width: 500px; 
        	height: 500px; 
        	margin: 100px auto;}
        #tagsList a {
        	position: absolute; 
        	top: 0px; 
        	left: 0px; 
        	color:lightskyblue; 
        	font-weight: bold;
        	font-family: "微软雅黑";
        	font-size: 20px;
        	text-decoration: none; 
        	padding: 5px 5px;}
        #tagsList a:hover {
        	color:lightpink;
        	letter-spacing: 5px;}
    </style>
	</head>
	<body>
		<div id="tagsList">
			<a href="#" title="HTML5">HTML5</a>
            <a href="#" title="CSS">CSS</a>
            <a href="#" title="Javascript">Javascript</a>
            <a href="#" title="PHP">PHP</a>
            <a href="#" title="Bootstrap">Bootstrap</a>
            <a href="#" title="Threejs">Threejs</a>
            <a href="#" title="Node.js">Node.js</a>
            <a href="#" title="SQL">SQL</a>
            <a href="#" title="JSON">JSON</a>
            <a href="#" title="Npm">Npm</a>
            <a href="#" title="XML">XML</a>
            <a href="#" title="JQuery">JQuery</a>
            <a href="#" title="Photoshop">Photoshop</a>
            <a href="#" title="Sass">Sass</a>
            <a href="#" title="Less">Less</a>
            <a href="#" title="GUI">GUI</a>
            <a href="#" title="API">API</a>
            <a href="#" title="Webpack">Webpack</a>
            <a href="#" title="Linux">Linux</a>
            <a href="#" title="Python">Python</a>
            <a href="#" title="Apache">Apache</a>
            <a href="#" title="WebApp">WebApp</a>
            <a href="#" title="Wordpress">Wordpress</a>
            <a href="#" title="BackboneJS">BackboneJS</a>
            <a href="#" title="AngularJS">AngularJS</a>
        </div>
		
		<script type="text/javascript">
			var radius = 240;
        var dtr = Math.PI/180;
        var d=300;
        var mcList = [];
        var active = false;
        var lasta = 1;
        var lastb = 1;
        var distr = true;
        var tspeed=10;
        var size=250;
        
        var angleX = Math.PI/240*1;
        var angleY = Math.PI/240*1;
        var angleZ = Math.PI/240*1;
 
        var mouseX=0;
        var mouseY=0;
 
        var howElliptical=1;
 
        var aA=null;
        var oDiv=null;
        
        function tagsList(x,y,z,a){
				this.x=x;
				this.y=y;
				this.z=z;
				this.a=a;
		}
        
        window.onload=function ()
        {
            var i=0;
            var oTag=null;
 
            oDiv=document.getElementById('tagsList');
 
            aA=oDiv.getElementsByTagName('a');
 
            for(i=0;i<aA.length;i++)
            {
                oTag={};
 
                oTag.offsetWidth=aA[i].offsetWidth;
                oTag.offsetHeight=aA[i].offsetHeight;
 
                mcList.push(oTag);
            }
 
            sineCosine( 0,0,0 );
 
            positionAll();
 
            oDiv.onmouseover=function ()
            {
                active=true;
            };
 
            oDiv.onmouseout=function ()
            {
                active=false;
            };
 
            oDiv.onmousemove=function (ev)
            {
                var oEvent=window.event || ev;
 
                mouseX=oEvent.clientX-(oDiv.offsetLeft+oDiv.offsetWidth/2);
                mouseY=oEvent.clientY-(oDiv.offsetTop+oDiv.offsetHeight/2);
 
                mouseX/=5;
                mouseY/=5;
            };
 
            setInterval(update, 30);
        };
 
        function update()
        {
            var a;
            var b;
 
            if(active)
            {
                a = (-Math.min( Math.max( -mouseY, -size ), size ) / radius ) * tspeed;
                b = (Math.min( Math.max( -mouseX, -size ), size ) / radius ) * tspeed;
            }
            else
            {
                a = lasta * 0.98;
                b = lastb * 0.98;
            }
 
            lasta=a;
            lastb=b;
 
            if(Math.abs(a)<=0.01 && Math.abs(b)<=0.01)
            {
                return;
            }
 
            var c=  0;
            sineCosine(a,b,c);
            for(var j=  0;j<mcList.length;j++)
            {
                var rx1=mcList[j].cx;
                var ry1=mcList[j].cy*ca+mcList[j].cz*(-sa);
                var rz1=mcList[j].cy*sa+mcList[j].cz*ca;
 
                var rx2=rx1*cb+rz1*sb;
                var ry2=ry1;
                var rz2=rx1*(-sb)+rz1*cb;
 
                var rx3=rx2*cc+ry2*(-sc);
                var ry3=rx2*sc+ry2*cc;
                var rz3=rz2;
 
                mcList[j].cx=rx3;
                mcList[j].cy=ry3;
                mcList[j].cz=rz3;
 
                per=d/(d+rz3);
 
                mcList[j].x=(howElliptical*rx3*per)-(howElliptical*2);
                mcList[j].y=ry3*per;
                mcList[j].scale=per;
                mcList[j].alpha=per;
 
                mcList[j].alpha=(mcList[j].alpha-0.6)*(10/6);
            }
 
            doPosition();
            depthSort();
        }
 
        function depthSort()
        {
            var i=  0;
            var aTmp=[];
 
            for(i=  0;i<aA.length;i++)
            {
                aTmp.push(aA[i]);
            }
 
            aTmp.sort
            (
                    function (vItem1, vItem2)
                    {
                        if(vItem1.cz>vItem2.cz)
                        {
                            return -1;
                        }
                        else if(vItem1.cz<vItem2.cz)
                        {
                            return 1;
                        }
                        else
                        {
                            return 0;
                        }
                    }
            );
 
            for(i=  0;i<aTmp.length;i++)
            {
                aTmp[i].style.zIndex=i;
            }
        }
 
        function positionAll()
        {
            var phi=  0;
            var theta=  0;
            var max=mcList.length;
            var i=  0;
 
            var aTmp=[];
            var oFragment=document.createDocumentFragment();
 
            //随机排序
            for(i=  0;i<aA.length;i++)
            {
                aTmp.push(aA[i]);
            }
 
            aTmp.sort
            (
                    function ()
                    {
                        return Math.random()<0.5?1:-1;
                    }
            );
 
            for(i=  0;i<aTmp.length;i++)
            {
                oFragment.appendChild(aTmp[i]);
            }
 
            oDiv.appendChild(oFragment);
 
            for( var i=  1; i<max+1; i++){
                if( distr )
                {
                    phi = Math.acos(-1+(2*i-1)/max);
                    theta = Math.sqrt(max*Math.PI)*phi;
                }
                else
                {
                    phi = Math.random()*(Math.PI);
                    theta = Math.random()*(2*Math.PI);
                }
                //坐标变换
                mcList[i-1].cx = radius * Math.cos(theta)*Math.sin(phi);
                mcList[i-1].cy = radius * Math.sin(theta)*Math.sin(phi);
                mcList[i-1].cz = radius * Math.cos(phi);
 
                aA[i-1].style.left=mcList[i-1].cx+oDiv.offsetWidth/2-mcList[i-1].offsetWidth/2+'px';
                aA[i-1].style.top=mcList[i-1].cy+oDiv.offsetHeight/2-mcList[i-1].offsetHeight/2+'px';
            }
        }
 
        function doPosition()
        {
            var l=oDiv.offsetWidth/2;
            var t=oDiv.offsetHeight/2;
            for(var i=  0;i<mcList.length;i++)
            {
                aA[i].style.left=mcList[i].cx+l-mcList[i].offsetWidth/2+'px';
                aA[i].style.top=mcList[i].cy+t-mcList[i].offsetHeight/2+'px';
 
                aA[i].style.fontSize=Math.ceil(12*mcList[i].scale/2)+8+'px';
 
                aA[i].style.filter="alpha(opacity="+100*mcList[i].alpha+")";
                aA[i].style.opacity=mcList[i].alpha;
            }
        }
 
        function sineCosine( a, b, c)
        {
            sa = Math.sin(a * dtr);
            ca = Math.cos(a * dtr);
            sb = Math.sin(b * dtr);
            cb = Math.cos(b * dtr);
            sc = Math.sin(c * dtr);
            cc = Math.cos(c * dtr);
        }
		</script>
	</body>
</html>
